I used to keep all my paper with one side free of printing. Then I noticed that the printer did not like that and it jammed often. So what to do? I bought a ream of Staples paper and am using it exclusively with the idea that I will no longer save all of the one sided and will simply recycle the stuff. Not a bad idea and my desk and work area is less messy and my printer looked up at me and smiled. The printer is exstatic that I no longer put used stuff into it and now my paper jamss have become almost not existent!